Door-knob.



W. SANDERSON.

DOOR KNOB.

APPLICATION FILED MAY 6. I9I5.

Patented June 6, 1916.

ill a k WITNESSES 129710 d W .QFFICE.

DOOR-KNOB.

Specification of Letters Patent.

Patented June 6, 1916.

Application filed May 6, 1915. Serial No. 26,190.

To all whom it may concern:

Be it known that 1, WILLIAM SANDERsoN, residing in the borough of Brooklyn, county of .Kings, city and State of New York, have invented certain new and useful Improvements in Door-Knobs, of which the following is a specification.

My invention relates to an improved construction of door-knob and means for attaching the knob to the spindle.

One of the objects of the invention is to provide a door-knob which is easy and inexpensive to construct and which is provided with a decorative or ornamental exterior and which may be easily and readily attached to the spindle.

Another object is to provide an inexpensive construction by means of which one of the door-knobs is fastened to the spindle so that it cannot be removed therefrom when attached to the door, except by first removing the other knob.

Other objects will appear from the following specification and claims.

In the drawings which form a part of this specification; Figure 1 represents a sectional view of a door-knob embodying my invention shown connected to a spindle. Fig.

2 is a side elevation of a door knob mounted upon a spindle, a portion of the knob being broken away. Fig. 3 is a sectional view of the portions of my door-knob and socket in position to be assembled. Fig. 4 is a perspective view of the socket. Fig. 5 is a sectional view of the door knob and socket con nection showing the means employed to permanently attach the door knob to the spin- 1 dle. Fig. 6 is a perspective view of the socket utilized in Fig. 5 with the spindle in position to be assembled. Fig. 7 is a detail in erspective of another form of locking device. Fig. 8 is a detail of a metal disk and celluloid cover to form the ornamental portion of the knob. Fig. 9 is a detail ofmetal disk with fabric cover to form the ornamental portion of the knob. Fig. 10 is a front elevation of the door knob showing the ornamental portion thereof.

Referring to the drawings in which simi lar characters refer to like parts; A is the knob, 13 the socket, C the spindle, D the ornamental plates of usual construction.

The door knob consists of a shell 10 of any suitable metal formed either by rolling or by pressing rubber against the metal to force tirely plain, as shown in Fig. 2 or a portion of the metal is cut out of the end of the knob to forma hole 11 of any suitable dimension, form and shape as shown in Fig. 1.

A plece of material such as pearl, shell,

glass, leather, fabric celluloid, wood, patentleather, horn or of animal or vegetable lvory or of any other material of contrasting color, preferably in the shape of a disk 12 1s fitted to the inner side of the hollow knob, and fills or entirely stops up the hole 11. The piece of material such as above described is provided with a flanged or thin edge which fits against the inner edges of the metal surrounding the hole or opening in the knob. The outer surface of the inserted piece is so shaped as to form practically a continuous surface with the outer surface of the metal portion of the knob.

The socket is formed of a hollow tubing, one end of which is provided with fiat sides, the preferred form being rectangular in cross-section. The end may be roughened or scarred or made into any shape other than circular, for reasons hereinafter specified. The socket is formed from a tube of one piece or it may be made by filling a tube having a comparatively thin wall with a hard alloy, the center of the socket being rectangular in cross-section, so that the rectangular spindle of similar size and shape in cross section may be closely fitted therein. A plate or disk 13 is stamped out into the shape shown in Figs. 1, 2 and 3 provided with a central opening 1 1 and a peripheral flange 15. The diameter of the opening 14 is just a little less than the extreme outer diameter of the socket, so that the edge of the plate 13 when mounted upon the socket will abut against a shoulder 16 on the peripheral socket as indicated in Figs. 1 and 3.

The ornamental disk 12 is inserted in place neatly filling the hole in the knob and the knob is then filled with a plastic composition, preferably of material known as Keenes cement. Hydraulic cement may also be used with advantage. The entire filling may consist entirely of one kind of cement or it may consist of one half cement and one halt of a mixture of whiting'and rosin. In this latter mixture, 1 use a little beeswax and. shellac either or both to give it the quality of elasticity, and to prevent brittleness. Any other suitable resin may be used. d hen the portions and 13 are filled with the plastic composition as above described, the socket :C with the circular plate 13 mounted thereon are forced into the plastic material until the plate 13 exactly covers the space in the rear of the knob, the flange 15 thereof projecting into the plastic material. The-plastic material is then permitted to set, and when it has set, the socket and the portion oi? the outer shell of the door-knob are all held firmly in place with respect to each other by means of the hardened. plastic material. A hole 16 is bored through the side of the socket and the spindle is inserted in the socket. The two are held together by means of a screw or a rivet 19 which engages a. hole 17 in the spindie. The rivet or screw may be in such a position that when the parts are assembled, it will be embedded in the cement filling of the knob.

In Figs. 5 and 6, T have shown a construction by means of which the socket of the door knob may be permanently secured to the spindle so as to prevent its removal therefrom when attached to the door. Such a structure is desirable for the door knob which is to be located outside of the door. The socket 12 is in most respects s in construction to the socket B shown in perspective in a; the exception being in the following particulars. The longitudinal hole 18 in the socket 12 is cylindrical in shape and its inner end is vided with screw-threads 18 The s has similar screw-threads 20 cut corners thereof so that these screwwill engage with the screwighreads in socket upon the insertion of the s, therein. At the outer edge the sock a series of notches 22. In the drawings, have illustrated four of these notches, but it is to be understood that l are not limited to this particular number as less than four and preferably more than four may be used.

Referring to 7, I provide a series of radially projecting pins 26 near the edge of the shell at the open end of the socket. The disk shaped key 23 is mounted upon the spindle closely fitting the same in a manner similar to the mounting of the disk shaped key 23 as shown in Fig. 6. indi cates small longitudinal cuts, slits or grooves in the edge of the disk 23* and they are positioned on the disk with relation. to the radial pins Which project inwardly from the shell of the socket. l hen the spindle is screwed upon the socket to a desired position, the disk is slid along the spindle and inserted in the open end of the socket, the projecting pins taking their positions in the cuts or slits on the edge of the disk 23. By means of this construction, when the parts are assembled the independent turn-- ing of either the door knob or spindle upon their respective axes is prevented and the two parts are therefore efi ectually locked together. it do not confine myself to any exact number of pins and slots. it is preferable to have several and to position them. at regular intervals from each other. As previously pointed out, the rose D when placed in position, covers up the locking means conceals it from view.

Before the spindle is inserted in the socket to screw the knob thereon, I lit on the spindle, as a key, a disk 23 havinga rec tangular opening 524. through its center, the spindle closely fitting the said opening. The disk is provided around its periphery with projections 25, each projection fitting a corresponding notch 22 in the end of the socket. W hen the spindle is screwed to the socket and the disk 23 putin place, the projections 25 fittin in the notches 22, the knob is permanently lured to the spindle and it is impossible'to turn the one on its axis inde pendently of the other. /V hen the knob is in plate upon the door, the rose or" usual construction eilectually conceals from view the locking; disk 23.

he shell of the knob, T

In constructing .ay an alter ve method, take a seaznher T ss tuhe e rorce sides the out against one si les of the die mold neans oi a robber plunger under pres c by the usual process of rolling. n o is then to? wed with opening in its outer end in w opening is placed disk of horn, pearl, leather, wood, celluloid or a disk ct any metal different quality from that forming the shell proper oi the knob. The locking disk may be embedded. in cement.

l Vhen using celluloid as the decorative material, it first use a metal di k 31 having any form ot outer face 32 (preferably concave) and then cover tne same with celluloid of any color. The metal disk with the eel luloidcover is then fitted to fill up the hole in the shell, the celluloid being exposed. Wren using" leather or any soft material 33, it is first backed up by a metal disk 3%, disk having a convex surface 35 following in contour that oi the knob.

The plate 13 mounted on the socket, which L to completes the door lniob and forms the inner side thereof may be made not only of metal, but of wood or any other suitable material. The knob may be oii'any desired shape and the contour of the opening through which the ornamental material is exposed may also be of any shape or pattern.

My decorative knob can be secured by the means described, or by any suitable means to each end of a rod or pole, and thus be utilized as a very desirable and practicable curtain pole.

What I claim as new and desire to secure by Letters Patent,.is

1. A door knob provided with a shell of thin material having an opening therein, a stopper for said opening seated therein, the outer surface of the stopper being in substantially the same plane as the outer surface of the shell, said stopper contrasting in material and appearance from the material of the shell, a plastic filling forthe shell to hold the parts in place.

2. A door knob composed of a shell of thin material, the shell being provided with oppositely disposed opepings pieces of material seated in the respective openings, at least one of said pieces of material is different from and contrasts "in appearance with the main portion of the shell, the exposed surfaces of said pieces of material lying in the plane of the shell, and plastic filling for the shell to hold the parts in place.

3. A door knob having a shell of thin material, a portion of the shell consisting of aseparate plate or disk, said plate or disk having a covering of flexible contrasting material.

4. A door knob composed of a shell of thin material, a portion of the shell being fitted with a stiffened disk of similar material provided with aconcave surface and a shell of translucent material placed over said concave surface.

5. A door knob having a shell of thin material provided with an opening therein, a disk or plate of difierent material fitted to said opening, the outer surface of the said disk or plate coinciding with the continuance of the plane of the outer surface of the shell, a plastic filling for the shell to hold the plate or disk thereto, a socket embedded in the plastic material, a spindle and means for permanently securing the spindle to the socket.

In witness whereof I have hereunto set my hand at the borough of Manhattan, city and State of New York, this fourth day of May, .1915.

WILLIAM SANDERSON.

In presence of- ISABEL R. RICHARDS, JOHN J. RANAGAN. 

